This article investigates and compares the electromagnetic performance of two novel hybrid-magnetic-circuit variable flux memory machines (HMC-VFMMs) with different hybrid permanent magnet (PM) configurations. The investigated HMC-VFMMs are both geometrically characterized by a combination of series and parallel magnetic circuit topologies, but with different positions of series and parallel PM branches. The developed HMC design can combine the merits of wide flux adjustment range in parallel structure and excellent unintentional demagnetization withstand capability in series structure. The topologies, features, and working principles of the studied HMC-VFMMs with different hybrid magnet configurations are described, respectively. The magnetic circuit model is utilized to analytically reveal the performance metrics of the two machines. The electromagnetic characteristics of the radially magnetized (RM) and circumferentially magnetized LCF types of HMC-VFMMs are evaluated and compared by the finite-element method. Furthermore, the performance comparison of the proposed RM-type HMC-VFMM with a benchmark interior PM machine is conducted. The experiments on RM-type HMC-VFMM prototype with RM-structure are carried out to validate the FE analyses.

中文翻译：

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具有不同混合磁铁配置的混合磁铁电路可变磁通存储器机器的研究

本文研究并比较了两种具有不同混合永磁 (PM) 配置的新型混合磁路可变磁通记忆机 (HMC-VFMM) 的电磁性能。研究的 HMC-VFMM 的几何特征都是串联和并联磁路拓扑的组合，但串联和并联 PM 分支的位置不同。开发的HMC设计可以结合并联结构中磁通调节范围宽的优点和串联结构中出色的意外退磁耐受能力。分别描述了所研究的具有不同混合磁体配置的 HMC-VFMM 的拓扑、特征和工作原理。磁路模型用于分析揭示两台机器的性能指标。通过有限元方法评估和比较径向磁化 (RM) 和周向磁化 LCF 类型的 HMC-VFMM 的电磁特性。此外，还对所提出的 RM 型 HMC-VFMM 与基准内部 PM 机器的性能进行了比较。对具有 RM 结构的 RM 型 HMC-VFMM 原型进行实验以验证有限元分析。